Re: strengths and weaknesses of Gnutella
Arne Babenhauserheide <[email protected]> Tue, 6 Apr 2010 12:07:04 +0200
| Newsgroups | gmane.network.gnutella.devel |
|---|---|
| Message-ID | <[email protected]> |
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Since noone poste other strengths and weaknesses, I assume we can go on to=
=20
looking for improvements.=20
Firstoff, here=E2=80=99s the list of the main strengths and weaknesses of t=
he current=20
Gnutella network:=20
+ Strength: Requires very little bandwidth for global connectivity (a
leaf can run off a 56k Modem, an UP off a ISDN line).
+ Strength: Powerful fully decentral swarming [additional note: with full
file verification using tiger tree hashing].
+ Strength: Seperation of exact search (locating sources) and fuzzy search
(looking for content; p2p Google) into two optimized networks (original
GNet + DHT; one tool for one task).
+ Strength: Can use standard http sources as seed files for downloads.
- Weakness: No included community building (like torrent sites with
statistcs and verification).
- Weakness: Hard to write a new servent which connects to Gnutella (harder
for new developers to get in).
- Weakness: No easy (and low overhead) way to do specialized searches (like
regexp or metadata - like =E2=80=9Cshow me articles written by Richard M.
Stallman=E2=80=9D).
- Weakness: No integration into desktop applications (like jabber clients
for finding first connections - or Gnutella for file transfer: =E2=80=9Chey=
, wait,
let me send you this file=E2=80=9D -> if the other is Gnutella enabled, sen=
d a
magnet with me as first source and automatically enter the swarm for
awesome download speeds).
As I see it, most of the weaknesses are no integral limitations, and aside=
=20
from the search limitation they aren=E2=80=99t even weaknesses of the proto=
col.=20
* Torrent-like trackers can be done via freebase and my simple tracker scri=
pt=20
(just about 500 loc, Python; optionally includes tigertree; tracker is firs=
t=20
source (http); free licensed (AGPL); still mostly untested, though).=20
This could be strengthened by factoring out the code for the download mesh,=
so=20
people can just use meshing downloads without being active in the network=20
otherwise.=20
- http://www.freebase.be/g2cache.php
- http://bitbucket.org/ArneBab/gnutella_tracker/
=E2=86=92 http://bitbucket.org/ArneBab/gnutella_tracker/src/tip/gnutella_tr=
acker.py
* Making it easier to write new servents today could mean creating easy to =
use=20
libraries (maybe with language bindings for scripting languages like python=
)=20
and polishing the documentation (for example the docs on http://gnet-
specs.gnufu.net ) for people who want to write a test-implementation. But f=
or=20
that the focus of the guides has to change from =E2=80=9Chow to create a Gn=
utella=20
servent=E2=80=9D to =E2=80=9CHow to use Gnutella in your Program (=E2=86=92=
C++, Java, =E2=80=A6)=E2=80=9D.=20
Draft for data a client needs from a library:=20
=E2=86=92=20
http://www.phex.org/wiki/index.php/Concepts#What_does_a_GUI_need_from_a_bac=
kend.3F
* Integration into free desktop applications could be facilitated by exposi=
ng=20
functions to DBus. For MacOSX and Windows, there=E2=80=99s the option of cr=
eating=20
Cocoa/Windows services.=20
=E2=86=92 http://en.wikipedia.org/wiki/D-Bus
=E2=86=92 http://www.freedesktop.org/wiki/Software/dbus
So specialized searches remain as the only weakness (I found) which can=E2=
=80=99t be=20
fixed without touching the protocol.=20
To make this stick: The primary vector to attack 3 of these 4 weaknesses is=
=20
NOT the network, but focussed documentation (how to USE Gnutella), integrat=
ion=20
(accessing Gnutella) and setting up centralized torrent-like sites for easy=
=20
Gnutella-backed downloads/uploads!=20
Which concrete steps can we take to tackle these?=20
Best wishes,=20
Arne
PS: Would it be possible to just include a magnet in a http link via the=20
following:=20
http://blah.foo/file.suf#magnet:?xt=3Durn:bitprint:=E2=80=A6&dn=3D=E2=
=80=A6&=E2=80=A6
If yes, this would allow creating file-links which work in normal downloade=
rs,=20
but only expose their full potential to a Gnutella-DL-mesh-aware download=20
manager. Any chat program could just append the magnet-information to file=
=20
links.=20
[Non-text portions of this message have been removed]
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=20=20=20=20=20=20
=20=20=20=20=20=20
<p>Since noone poste other strengths and weaknesses, I assume we can =
go on to <br>
looking for improvements. <br>
<br>
Firstoff, here=E2=80=99s the list of the main strengths and weaknesses of t=
he current <br>
Gnutella network: <br>
<br>
+ Strength: Requires very little bandwidth for global connectivity (a<br>
leaf can run off a 56k Modem, an UP off a ISDN line).<br>
<br>
+ Strength: Powerful fully decentral swarming [additional note: with full<b=
r>
file verification using tiger tree hashing].<br>
<br>
+ Strength: Seperation of exact search (locating sources) and fuzzy search<=
br>
(looking for content; p2p Google) into two optimized networks (original<br>
GNet + DHT; one tool for one task).<br>
<br>
+ Strength: Can use standard http sources as seed files for downloads.<br>
<br>
- Weakness: No included community building (like torrent sites with<br>
statistcs and verification)<wbr>.<br>
<br>
- Weakness: Hard to write a new servent which connects to Gnutella (harder<=
br>
for new developers to get in).<br>
<br>
- Weakness: No easy (and low overhead) way to do specialized searches (like=
<br>
regexp or metadata - like =E2=80=9Cshow me articles written by Richard M.<b=
r>
Stallman=E2=80=9D).<br>
<br>
- Weakness: No integration into desktop applications (like jabber clients<b=
r>
for finding first connections - or Gnutella for file transfer: =E2=80=9Chey=
, wait,<br>
let me send you this file=E2=80=9D -> if the other is Gnutella enabled, =
send a<br>
magnet with me as first source and automatically enter the swarm for<br>
awesome download speeds).<br>
<br>
As I see it, most of the weaknesses are no integral limitations, and aside =
<br>
from the search limitation they aren=E2=80=99t even weaknesses of the proto=
col. <br>
<br>
* Torrent-like trackers can be done via freebase and my simple tracker scri=
pt <br>
(just about 500 loc, Python; optionally includes tigertree; tracker is firs=
t <br>
source (http); free licensed (AGPL); still mostly untested, though). <br>
This could be strengthened by factoring out the code for the download mesh,=
so <br>
people can just use meshing downloads without being active in the network <=
br>
otherwise. <br>
- <a href=3D"http://www.freebase.be/g2cache.php">http://www.freebase<wbr>.b=
e/g2cache.<wbr>php</a><br>
- <a href=3D"http://bitbucket.org/ArneBab/gnutella_tracker/">http://bitbuck=
et.<wbr>org/ArneBab/<wbr>gnutella_<wbr>tracker/</a><br>
=E2=86=92 <a href=3D"http://bitbucket.org/ArneBab/gnutella_tracker/src/tip/=
gnutella_tracker.py">http://bitbucket.<wbr>org/ArneBab/<wbr>gnutella_<wbr>t=
racker/src/<wbr>tip/gnutella_<wbr>tracker.py</a><br>
<br>
* Making it easier to write new servents today could mean creating easy to =
use <br>
libraries (maybe with language bindings for scripting languages like python=
) <br>
and polishing the documentation (for example the docs on <a href=3D"http://=
gnet-">http://gnet-</a><br>
specs.gnufu.<wbr>net ) for people who want to write a test-implementation<w=
br>. But for <br>
that the focus of the guides has to change from =E2=80=9Chow to create a Gn=
utella <br>
servent=E2=80=9D to =E2=80=9CHow to use Gnutella in your Program (=E2=86=92=
C++, Java, =E2=80=A6)=E2=80=9D. <br>
Draft for data a client needs from a library: <br>
=E2=86=92 <br>
<a href=3D"http://www.phex.org/wiki/index.php/Concepts#What_does_a_GUI_need=
_from_a_backend.3F">http://www.phex.<wbr>org/wiki/<wbr>index.php/<wbr>Conce=
pts#<wbr>What_does_<wbr>a_GUI_need_<wbr>from_a_backend.<wbr>3F</a><br>
<br>
* Integration into free desktop applications could be facilitated by exposi=
ng <br>
functions to DBus. For MacOSX and Windows, there=E2=80=99s the option of cr=
eating <br>
Cocoa/Windows services. <br>
=E2=86=92 <a href=3D"http://en.wikipedia.org/wiki/D-Bus">http://en.wikipedi=
a<wbr>.org/wiki/<wbr>D-Bus</a><br>
=E2=86=92 <a href=3D"http://www.freedesktop.org/wiki/Software/dbus">http://=
www.freedesk<wbr>top.org/wiki/<wbr>Software/<wbr>dbus</a><br>
<br>
So specialized searches remain as the only weakness (I found) which can=E2=
=80=99t be <br>
fixed without touching the protocol. <br>
<br>
To make this stick: The primary vector to attack 3 of these 4 weaknesses is=
<br>
NOT the network, but focussed documentation (how to USE Gnutella), integrat=
ion <br>
(accessing Gnutella) and setting up centralized torrent-like sites for easy=
<br>
Gnutella-backed downloads/uploads! <br>
<br>
Which concrete steps can we take to tackle these? <br>
<br>
Best wishes, <br>
Arne<br>
<br>
PS: Would it be possible to just include a magnet in a http link via the <b=
r>
following: <br>
<a href=3D"http://blah.foo/file.suf#magnet:?xt=3Durn:bitprint:">http://blah=
.<wbr>foo/file.<wbr>suf#magnet:<wbr>?xt=3Durn:bitprint<wbr>:</a>=E2=80=A6&a=
mp;amp;dn=3D=E2=80=A6&amp;=E2=80=A6<br>
<br>
If yes, this would allow creating file-links which work in normal downloade=
rs, <br>
but only expose their full potential to a Gnutella-DL-<wbr>mesh-aware downl=
oad <br>
manager. Any chat program could just append the magnet-information to file =
<br>
links. <br>
<br>
[Non-text portions of this message have been removed]<br>
<br>
</p>
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